This was the way I was supposed to write it (every thing separated). Any way, I was wondering why when ever I try to run I only get NaN for roots, and my discriminant is off
/**
* Find roots of quadratic equations
*/
import java.util.Scanner;
public class QuadraticProject {
public static void main(String[] args) {
[Code] ....
It's about a backtracking algorithm trying to solve a sudoku, represented by an array of integer arrays. For testing matters, the start field is empty.
static boolean solve(int[][] field, int i, int j) {
if (filled(field)) {
return legal(field);
} else {
for (int k = 1; k <= 9; k++) {
field[i][j] = k;
[Code] ....
I am suppose to write a method for solving a quadratic equation using the following header:
public static int solveQuadratic(double[] eqn, double[] roots)
I have entered 1, -3 and -4. The answer I get is "The solution is:0.0" .
import java.util.Scanner;
public class QuadratilEq {
public static void main(String[] args) {
// TODO Auto-generated method stub
Scanner input = new Scanner (System.in);
double[] eqn = new double[3];
double[] roots = new double[4];
[Code] .....
I have just started to learn programming in the book I am teaching myself from it said how would you write the following arithmetic expression with it being the quadratic formula but only the plus part of it in the plus or minus..
package javalearning;
import java.util.Scanner;
public class QuadraticFormula {
public static void main(String[] args){
Scanner input = new Scanner(System.in);
System.out.print("Enter value for B: ");
double B = input.nextDouble();
System.out.print("Enter value for A: ");
double A = input.nextDouble();
System.out.print("Enter value for C: ");
double C = input.nextDouble();
double negativeOfB = -B;
[code]....
Write a program named QuadraticTable.java that takes three double arguments and two int arguments (in that order) from the command line. The three doubles will represent a, b, and c from the quadratic formula.
If the discriminant is non-negative, find and print the solutions to the quadratic equation. (The plus/minus sign in the quadratic formula indicates that you would separately perform both operations). Otherwise print "no real solutions".
Then using the last two int arguments as x_min and x_max, print a table of x and ax
2 + bx + c
values using the a, b, and c read in as command line arguments.
Sample output: (command line arguments were 1 0 2 -3 3)
1x^2 + 0x + 2 has no real solutions.
X 1x^2 + 0x + 2
-3 11
-2 6
-1 2
0 2
1 3
2 6
3 11
I am working on a program that should take an input file as a command line argument and check if that file contains a valid sudoku solution. Right now the main error I am getting is my scanner isn't functioning properly and is throwing inputMismatchexceptions, but Im also not sure about the validity of my functions, and i cannot test them because my scanner isn't working.
import java.util.Scanner;
//This class will read in a possible sudoku solution and test it for validity. If it is invalid, return at least one reason why.
public class SudokuVerifier {
//this function checks a row to see if it contains the numbers 1-9
public static boolean checkRow(int sudoku[][], int i) {
boolean contains=false; // keeps track if the line contains a certain number
for(int k=1; k<=9; k++) { //goes through every number from 1 to 9
for(int j=1; j<sudoku[i].length; j++) { //checks every element in the row to see if it is equal to k
[code]...
I am in search of a library that has been created in JAVA that can be utilized to solve for roots of a nonlinear system of equations. Each equation has 2 variables, x and y, and will need a library that uses higher calculus equations. No ones that just solve for x.
Most of the libraries that have been created to solve nonlinear equations are either in Fortran, C, or Python. There are a few libraries such minpack/scipy. The only libraries that I have been able to find or programming solutions that are in JAVA either require additional programs such as Matlab or are commercial products
I did find one library put together by a professor in Colorado State, but am unsure how to use it. There does not seem to be a way to enter your functions in the code.
Newton Raphson Method - Multivariable(x and y)
[URL] .....
How to use this library or find a library that can be used in an android application would be amazing.
I am in search of a library that has been created in JAVA that can be utilized to solve for roots of a nonlinear system of equations. Each equation has 2 variables, x and y, and will need a library that uses higher calculus equations. No ones that just solve for x.
Most of the libraries that have been created to solve nonlinear equations are either in Fortran, C, or Python. There are a few libraries such minpack/scipy. The only libraries that I have been able to find or programming solutions that are in JAVA either require additional programs such as Matlab or are commercial products
I did find one library, but am unsure how to use it. There does not seem to be a way to enter your functions in the code.
Newton Raphson Method - Multivariable(x and y)
www(.)math.colostate(.edu)/~benoi...s/solvers.html
How to use this library or find a library that can be used in an android application.
I just created a program to calculate the roots for a 2. degree equation, When I first created my program, I defined the r1 and r2 as double, but got an error saying they needed to be defined as String, why is that?When should I be using string? I am new to java and I have mostly only used int, double and Boolean so far.
import java.util.Scanner;
import java.text.DecimalFormat;
public class c3e1 {
public static void main(String[]args){
[code]....
I am in search of a library that has been created in JAVA that can be utilized to solve for roots of a nonlinear system of equations. Each equation has 2 variables, x and y, and will need a library that uses higher calculus equations. No ones that just solve for x.
Most of the libraries that have been created to solve nonlinear equations are either in Fortran, C, or Python. There are a few libraries such minpack/scipy. The only libraries that I have been able to find or programming solutions that are in JAVA either require additional programs such as Matlab or are commercial products
I did find one library put together by a professor in Colorado State, but am unsure how to use it. There does not seem to be a way to enter your functions in the code.
Newton Raphson Method - Multivariable(x and y) Page Not Found
How to use this library or find a library that can be used in an android application would be amazing.
I develop a finite element code at java. I am looking for efficiency solver and fast for large, sparse , symmetric and positive define matrices .
i used in jblas but i encounter in problem when the matrix has high condition number(ill condition number) and i get error for singular matrix while in mathematica i succeed to solve that system without problems...
Any good solver and fast solver package in java can i use for solving that system?